:root {
    --font: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    --bg: #0c1624;
    --surface: #122338;
    --surface-2: #162b44;
    --text: #eaf2fb;
    --muted: #cfdeed;
    --accent: #54b9ff;
    --radius: 1rem;
    --radius-sm: 0.5rem;
    --radius-pill: 999px;
    --container-laptop: 76rem;
    --container-desktop: 84rem;
    --gutter: clamp(0.9rem, 0.55rem + 1.2vw, 1.6rem);
    --space-1: clamp(0.38rem, 0.33rem + 0.18vw, 0.5rem);
    --space-2: clamp(0.56rem, 0.5rem + 0.3vw, 0.74rem);
    --space-3: clamp(0.76rem, 0.66rem + 0.45vw, 1rem);
    --space-4: clamp(0.96rem, 0.82rem + 0.65vw, 1.3rem);
    --space-5: clamp(1.24rem, 1.02rem + 1vw, 1.8rem);
    --section-pad: clamp(0.96rem, 0.82rem + 0.65vw, 1.3rem);
    --section-gap: clamp(1.12rem, 0.94rem + 0.8vw, 1.56rem);
    --fs-body: clamp(0.94rem, 0.9rem + 0.12vw, 1rem);
    --fs-h1: clamp(1.38rem, 1.12rem + 1.1vw, 1.92rem);
    --fs-h2: clamp(1.1rem, 0.98rem + 0.55vw, 1.36rem);
    --fs-h3: clamp(0.98rem, 0.92rem + 0.3vw, 1.14rem);
}

* { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    overflow-x: clip;
}

body {
    margin: 0;
    font: var(--fs-body)/1.58 var(--font);
    color: var(--text);
    background: var(--bg);
}

img, svg { max-width: 100%; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { margin-top: 0; line-height: 1.2; }
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p, ul, ol { margin: 0 0 var(--space-3); }
ul, ol { padding-left: 1.2rem; }

.u-visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

:focus-visible {
    outline: 3px solid #a8ddff;
    outline-offset: 3px;
    box-shadow: 0 0 0 2px rgba(8, 24, 38, 0.9);
}

/* Layout */
.c-header,
.l-page-main,
.c-footer {
    width: min(100% - 2 * var(--gutter), var(--container-laptop));
    margin-inline: auto;
}

.l-page-main {
    display: grid;
    gap: var(--section-gap);
    padding-block: var(--section-gap);
}

.l-section {
    display: grid;
    gap: var(--space-4);
    padding: var(--section-pad);
    border-radius: var(--radius);
    border: 1px solid color-mix(in srgb, var(--muted), transparent 84%);
    background: color-mix(in srgb, var(--surface), transparent 9%);
}

.l-section__title {
    margin: 0;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: #d7ebff;
}

.l-section:target {
    scroll-margin-top: 7rem;
    outline: 2px solid color-mix(in srgb, var(--accent), transparent 35%);
}

.l-section__content,
.l-section__content p { max-width: 70ch; }
.l-section--about .l-section__content { max-width: none; }
#experience .l-section__content,
#experience .l-section__content p { max-width: none; }

/* Header + navigation */
.c-header {
    position: sticky;
    top: 0;
    z-index: 10;
    margin-top: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius);
    border: 1px solid color-mix(in srgb, var(--muted), transparent 80%);
    background: color-mix(in srgb, var(--bg), #091322 16%);
    backdrop-filter: blur(6px);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
}

.c-header__name { margin: 0; font-size: clamp(1rem, 0.9rem + 0.4vw, 1.2rem); }

.c-header__menu-toggle {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid color-mix(in srgb, var(--muted), transparent 40%);
    color: var(--text);
    background: color-mix(in srgb, var(--surface), transparent 15%);
    cursor: pointer;
}

.c-nav { width: 100%; position: relative; }

.c-nav__list {
    list-style: none;
    margin: 0;
    padding: var(--space-2);
    border: 1px solid color-mix(in srgb, var(--muted), transparent 62%);
    border-radius: 0.75rem;
    background: color-mix(in srgb, var(--bg), #081220 18%);
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    position: absolute;
    inset: calc(100% + var(--space-1)) 0 auto;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-0.4rem);
    transition: opacity .2s ease, transform .2s ease;
}

.c-nav.c-nav--open .c-nav__list {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
}

.c-nav__link {
    display: inline-flex;
    align-items: center;
    min-height: 2.75rem;
    width: 100%;
    padding: 0.35rem 0.75rem;
    border: 1px solid transparent;
    border-radius: var(--radius-pill);
    color: var(--text);
}

.c-nav__link:hover,
.c-nav__link.active {
    color: #fff;
    text-decoration: none;
    background: color-mix(in srgb, var(--accent), transparent 80%);
    border-color: color-mix(in srgb, var(--accent), transparent 42%);
}


.no-js .c-header__menu-toggle {
    display: none;
}

.no-js .c-nav {
    width: auto;
    margin-left: auto;
}

.no-js .c-nav__list {
    position: static;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    padding: 0;
    border: 0;
    background: transparent;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.2rem;
}

/* About */
.about-hero,
.about-subsection,
.timeline-card,
.project-item,
.pub-item,
.contact-card {
    padding: var(--section-pad);
    border: 1px solid color-mix(in srgb, var(--muted), transparent 82%);
    border-radius: var(--radius);
    background: color-mix(in srgb, var(--surface-2), transparent 10%);
}

.about-hero { display: grid; gap: var(--space-4); margin-bottom: var(--space-4); }
.about-hero__media { display: flex; justify-content: center; }
.about-hero__image {
    width: 240px;
    max-width: 100%;
    height: auto;
    aspect-ratio: 1072 / 1280;
    object-fit: cover;
    border-radius: 50%;
    border: 3px solid color-mix(in srgb, var(--accent), #fff 10%);
}
.about-hero__content { text-align: center; }
.about-hero__eyebrow { margin-bottom: var(--space-1); text-transform: uppercase; font-size: 0.78rem; }
.about-hero__name { margin-bottom: var(--space-1); }
.about-hero__subtitle,
.about-hero__affiliation { color: var(--muted); margin-bottom: var(--space-2); }
.about-hero__summary h4 { margin: 0 0 var(--space-1); }
.about-hero__summary p:last-child { margin-bottom: 0; }

.about-hero__links,
.about-subsections,
.project-item__links,
.pub-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
}

.about-subsections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-3);
}

.about-hero__links a,
.project-cta,
.c-secondary-link,
.contact-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.75rem;
    padding: 0.35rem 0.72rem;
    border-radius: var(--radius-pill);
    border: 1px solid color-mix(in srgb, var(--accent), transparent 48%);
    background: color-mix(in srgb, var(--accent), transparent 86%);
    color: #fff;
    font-weight: 600;
    font-size: 0.85rem;
}

.pub-links .c-secondary-link {
    min-height: 2.7rem;
    padding: 0.2rem 0.6rem;
    font-size: 0.78rem;
    letter-spacing: 0.01em;
}


.project-item__links {
    align-items: stretch;
}

.project-cta {
    white-space: nowrap;
}

.project-list--single {
    max-width: 42rem;
}

.project-list--single .project-item {
    display: grid;
    gap: var(--space-2);
    text-align: left;
}

.project-list--single .project-item__title {
    margin-bottom: 0;
    letter-spacing: 0.01em;
    text-transform: uppercase;
}

.project-list--single .project-item__description {
    margin-bottom: 0;
    color: #d7e5f4;
}

.project-list--single .project-item__links {
    justify-content: flex-start;
}
/* Experience */
.timeline {
    --timeline-axis-offset: clamp(3.8rem, 9.2vw, 7.6rem);
    position: relative;
    display: grid;
    gap: var(--space-3);
}

.timeline::before {
    content: "";
    position: absolute;
    left: var(--timeline-axis-offset);
    top: 0.6rem;
    bottom: 0.6rem;
    width: 2px;
    transform: translateX(-50%);
    background: color-mix(in srgb, var(--accent), transparent 60%);
}

.timeline-item {
    display: grid;
    grid-template-columns: minmax(2.2rem, clamp(3.2rem, 8.5vw, 7rem)) 1.4rem minmax(0, 1fr);
    gap: var(--space-2);
    align-items: start;
}

.timeline-marker {
    width: .9rem;
    height: .9rem;
    margin-top: 0.8rem;
    justify-self: center;
    border-radius: 50%;
    border: 2px solid color-mix(in srgb, var(--accent), transparent 20%);
    background: color-mix(in srgb, var(--accent), transparent 65%);
    z-index: 1;
}

.timeline-card {
    grid-column: 3;
    min-width: 0;
    width: min(100%, 74ch);
    overflow-wrap: anywhere;
    word-break: normal;
}

.timeline-card__meta,
.timeline-card__description { color: #dce9f6; }

.timeline-card__list {
    margin: var(--space-1) 0 0;
    padding-inline-start: 1.05rem;
}

.timeline-card__list li {
    margin-bottom: 0.42rem;
    padding-inline-start: 0.15rem;
    line-height: 1.45;
    overflow-wrap: anywhere;
}

/* Projects + publications */
.project-list,
.pub-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: var(--space-3);
}

.pub-main { margin-bottom: var(--space-1); line-height: 1.4; }
.pub-year { color: #a8d9ff; font-weight: 700; white-space: nowrap; }
.pub-authors,
.pub-meta {
    margin-bottom: var(--space-1);
    color: #c4d3e2;
    font-size: 0.92rem;
    line-height: 1.45;
}
.pub-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.2rem 0.85rem;
    color: #b9cbde;
}
.pub-venue,
.pub-doi {
    overflow-wrap: anywhere;
    word-break: normal;
}

.pub-item {
    display: grid;
    gap: var(--space-1);
}

.pub-item > * {
    margin: 0;
}

.pub-list {
    max-width: 82ch;
}

.pub-cite {
    min-width: 0;
}

.pub-cite pre {
    margin-top: var(--space-1);
    max-width: 100%;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: break-word;
}

#publications .l-section__content,
#publications .l-section__content p {
    max-width: 86ch;
}

.pub-title-link {
    color: #fff;
    text-decoration: underline;
    text-underline-offset: 0.12em;
    overflow-wrap: anywhere;
    word-break: normal;
}
.pub-links {
    margin-top: var(--space-1);
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    gap: 0.45rem;
}

.pub-links > * {
    flex: 0 0 auto;
}

/* Contact + footer */
.contact-list { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-2); }
.contact-link { justify-content: flex-start; gap: var(--space-1); flex-direction: row; }
.contact-link__label { line-height: 1; }
.contact-link__icon { width: 1rem; height: 1rem; display: inline-flex; }
.contact-link__icon svg { width: 100%; height: 100%; fill: currentColor; }

.c-footer {
    padding: 0 0 var(--space-5);
    color: color-mix(in srgb, var(--muted), transparent 12%);
    text-align: center;
    font-size: 0.82rem;
}

/* Explicit responsive zones */
/* Desktop: >= 992px */
@media (min-width: 992px) {
    .c-header,
    .l-page-main,
    .c-footer {
        width: min(100% - 2 * var(--gutter), var(--container-desktop));
    }

    .l-section {
        grid-template-columns: minmax(11rem, 14rem) minmax(0, 1fr);
        align-items: start;
        column-gap: clamp(1.3rem, 0.8rem + 1.1vw, 2.2rem);
    }

    .l-section__title {
        position: sticky;
        top: 6.4rem;
    }

    .c-header__menu-toggle { display: none; }

    .c-nav {
        width: auto;
        margin-left: auto;
    }

    .c-nav__list {
        position: static;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: none;
        padding: 0;
        border: 0;
        background: transparent;
        flex-direction: row;
        gap: 0.2rem;
    }

    .c-nav__link {
        width: auto;
    }

    .about-hero {
        grid-template-columns: 250px 1fr;
        align-items: center;
    }

    .about-hero__media {
        justify-content: flex-start;
    }

    .about-hero__content { text-align: left; }

    .about-subsections {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    #experience .timeline-card {
        padding: clamp(1rem, 0.74rem + 0.55vw, 1.3rem) clamp(1.06rem, 0.68rem + 0.78vw, 1.52rem);
    }
}

@media (min-width: 992px) and (max-width: 1366px) {
    #experience .timeline {
        --timeline-axis-offset: clamp(3.5rem, 8.5vw, 6.8rem);
    }

    #experience .timeline-item {
        grid-template-columns: minmax(1.7rem, clamp(2.4rem, 6.8vw, 5.6rem)) 1.25rem minmax(0, 1fr);
        gap: clamp(0.62rem, 0.5rem + 0.33vw, 0.84rem);
    }

    #experience .timeline-card {
        width: min(100%, 82ch);
    }
}


@media (max-width: 991px) {
    .timeline::before {
        display: none;
    }

    .timeline-item {
        grid-template-columns: minmax(0, 1fr);
    }

    .timeline-marker {
        display: none;
    }

    .timeline-card {
        grid-column: 1;
    }
}

/* Tablet: 577px - 991px */
@media (min-width: 577px) and (max-width: 991px) {
    .c-header,
    .l-page-main,
    .c-footer {
        width: min(100% - 2 * var(--gutter), 52rem);
    }

    .about-hero {
        gap: var(--space-3);
    }

    .about-hero__image {
        width: 220px;
    }

    .pub-links,
    .project-item__links {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* Mobile: <= 576px */
@media (max-width: 576px) {
    .c-header,
    .l-page-main,
    .c-footer {
        width: min(100% - 2 * var(--gutter), 100%);
    }

    .about-hero__image {
        width: clamp(160px, 42vw, 210px);
    }

    .l-section,
    .about-hero,
    .about-subsection,
    .timeline-card,
    .project-item,
    .pub-item,
    .contact-card { padding: var(--section-pad); }

    .pub-links,
    .project-item__links {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
    }

    .pub-links > * {
        width: 100%;
    }

    .pub-links .c-secondary-link {
        width: 100%;
    }

    .pub-main {
        overflow-wrap: anywhere;
    }

    .pub-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.2rem;
    }

    .pub-doi a {
        overflow-wrap: anywhere;
    }

    .about-hero__links { justify-content: center; }

    .contact-link {
        flex-direction: row;
        align-items: center;
        flex-wrap: wrap;
    }
}